Bert is a small blue tender engine from the Arlesdale Railway.
Bert is based on the Ravenglass and Eskdale Railway's River Irt.
Bert is painted NWR blue with red-and-yellow lining. He has a brass dome, red nameplates with yellow writing mounted each side of his boiler and "Arlesdale" written on his tender in yellow.
- Blisters (mentioned)
- An Arlesdale Adventure (mentioned)
- Crystal Island Adventure (mentioned)
- The New Line
The Search For The Controllers Part 2
He may appear in The Best Start To Summer and The Search For The Controllers Part 3.
- Bert did not appear in an episode until season 4, unlike the other Small Railway Engines, who all appeared in season 2.